The Wars of the Loon Succession (Dutch: Loonse Successieoorlogen, French: Guerres de succession de Looz) is the name of the war of succession that arose after the childless death of on 22 January 1336. In the first period, the County of Loon led by claimant Diederik of Heinsberg managed to maintain its autonomy in relation to the Prince-Bishopric of Liège. During the second period, however, Arnold of Rummen, the last indigenous claimant to the title of count of Loon, first had to sell the County of Chiny to the Duchy of Luxemburg to cover his military expenses, and soon after conceded defeat. The wars came to an end with the annexation of Loon by Liège in 1366.